nix-update

name: nix-update description: "Update this dotfiles flake.lock, compare key Nix package versions, verify the update, and summarize changed packages. Use for Nix flake maintenance in this repo."

Nix Update

Goal

Update this repository's Nix flake inputs and summarize important package version changes.

Success means flake.lock is updated, relevant packages are compared where possible, verification commands pass or failures are clearly reported, and the user knows how to install the updated profile.

Stop when the update is verified or the lockfile is restored after a failed update.

Workflow

1. Inspect the current state:

git status --short
git diff -- flake.lock
git rev-parse HEAD:flake.lock >/dev/null 2>&1 && git show HEAD:flake.lock | rg '"rev"'

2. Capture the current nixpkgs commit from flake.lock.
3. Run the repo update command:

make update

4. Capture the new nixpkgs commit from flake.lock.
5. Read flake.nix and compare versions only for packages that are actually present.
6. Verify the update:

make test-pre
nix build .#default --dry-run

7. If verification fails because of the update, explain the failure and recommend reverting flake.lock. Do not revert user changes unless the user asks.

Packages To Compare When Present

• Version control: git, gh, lazygit.
• Languages: rustup, go, python3, deno, bun.
• Shell and terminal: fish, zsh, tmux, starship, zellij.
• CLI tools: ripgrep, fd, bat, eza, delta, fzf, jq, yq.
• Editors and agents: neovim, codex, claude-code.
• Dev tools: direnv, nix-direnv.
• Containers: docker-client, docker-compose, lazydocker, k9s.
• System tools: htop, btop, ncdu.
• Other tools: just, buf, grpcurl, dogdns.

Use this form for version checks:

nix eval "github:NixOS/nixpkgs/<commit>#<package>.version" --raw

If a package cannot be evaluated, mark it N/A and continue.

Version Summary

Report:

## Flake Update

- nixpkgs: `<old>` -> `<new>`
- Compare: https://github.com/NixOS/nixpkgs/compare/<old>..<new>

## Package Updates

| Package | Old | New | Notes |
| --- | --- | --- | --- |
| git | 2.x | 2.y | patch |

## Verification

- `make test-pre`: pass/fail
- `nix build .#default --dry-run`: pass/fail

## Next Steps

- Review and commit `flake.lock`.
- Install the updated packages with `make install-packages` or `nix profile install . --priority 5`.

Constraints

• Keep output concise and actionable.
• Run independent version comparisons in parallel when practical.
• Do not compare packages that are not in flake.nix.
• Do not imply that updating flake.lock updates the installed profile.
• Preserve unrelated working tree changes.